Here's why:
* He feels isolated and out of place: Percy watches the bustling city life from his window, feeling "like a ghost in a haunted house." He observes the "families" enjoying themselves and the "couples" holding hands, but he is alone. This emphasizes his loneliness and lack of a typical family unit.
* He longs for connection: Percy yearns for the normalcy he sees in the city, even fantasizing about "having a mother and a father who weren't always fighting." This reveals his deep desire for a loving and supportive home environment, which he has been deprived of.
* The taxis represent his instability: The taxis, constantly moving and changing, symbolize the instability in Percy's life. He has been bounced around foster homes and has never truly known what it means to have a permanent and loving home.
Instead of providing a glimpse into "home life," Percy's view from the window reflects his own personal struggle with belonging and the longing for a place where he truly feels at home.